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The Visible Sun Revisited
Scientists working with the SOHO/MDI instrument have continued to improve on previous results. Since the first release (SOHO/MDI's 'Window' Through the Sun), improvements in helioseismology techniques have enabled them to extract more information from the same data. In this case, sonogram-type imaging of the solar far side (the side of the Sun NOT facing the Earth) has been improved to provide a more complete view of the farside.

This is important in space weather forecasting as it enables us to see large sunspots and active regions before they are visible directly from the Earth. Active regions are a source of solar flares which can send high-energy protons towards the Earth. These protons can damage satellite electronics, endangering communications and weather forecasting, and are a health threat to astronauts.


Opening with a view of the Sun visible from SOHO, we move around to the eastern limb (as seen from Earth) where we see the farside data constructed by helioseismology studies. During the movie, several sunspot groups move from the farside to the Earthside of the Sun.    Opening with a view of the Sun visible from SOHO, we move around to the eastern limb (as seen from Earth) where we see the farside data constructed by helioseismology studies. During the movie, several sunspot groups move from the farside to the Earthside of the Sun.
Duration: 19.0 seconds
Available formats:
  320x240 (30 fps) MPEG-1   1010 KB
  640x480 (30 fps) MPEG-1   3 MB
  720x480 (30 fps) MPEG-2   3 MB
  320x240     JPEG         27 KB
  160x80       PNG           27 KB
  80x40         PNG           8 KB
  1280x720 (29.97 fps) Frames
  720x486 (29.97 fps) Frames
  1280x720 (30 fps) MPEG-2   10 MB
  640x480 (29.97 fps) MPEG-4   8 MB
  1280x720 (29.97 fps) MPEG-4   14 MB
  512x288 (29.97 fps) MPEG-1   2 MB
  1280x720 (29.97 fps) MPEG-2   42 MB
How to play our movies


Full view of the Sun from SOHO/MDI    Full view of the Sun from SOHO/MDI

Available formats:
  2560 x 1920     TIFF 2 MB
  320 x 240         PNG 49 KB


A relatively featureless view of the eastern limb of the Sun (October 6, 2003).    A relatively featureless view of the eastern limb of the Sun (October 6, 2003).

Available formats:
  2560 x 1920     TIFF 1 MB
  320 x 240         JPEG 30 KB


Some spot group approach the limb from the farside (November 18, 2003, 06UT).    Some spot group approach the limb from the farside (November 18, 2003, 06UT).

Available formats:
  2560 x 1920     TIFF 1 MB
  320 x 240         JPEG 31 KB


The leading spot group has moved around the limb and is now visible from the Earth. The trailing spot group is still approaching the limb (November 16, 2003 17UT).    The leading spot group has moved around the limb and is now visible from the Earth. The trailing spot group is still approaching the limb (November 16, 2003 17UT).

Available formats:
  2560 x 1920     TIFF 1 MB
  320 x 240         JPEG 31 KB


The trailing spot group moves to the Earthside view of the Sun (November 19, 2003).    The trailing spot group moves to the Earthside view of the Sun (November 19, 2003).

Available formats:
  2560 x 1920     TIFF 1 MB
  320 x 240         JPEG 31 KB

Animation Number:3336
Animator:Tom Bridgman (SVS) (Lead)
Completed:2006-02-07
Scientists:Phil Sherrer (Stanford University)
 Joe Gurman (NASA/GSFC)
Instrument:SOHO/MDI
Data Collected:2003-09-06T10:00:00 -
Keywords:
SVS >> HDTV
SVS >> Helioseismology
SVS >> Solar Rotation
DLESE >> Space science
SVS >> Sun
GCMD >> EARTH SCIENCE >> Sun-earth Interactions >> Solar Activity >> Sunspots
 
 
Please give credit for this item to
NASA/Goddard Space Flight Center Scientific Visualization Studio


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